13121474 has 4 divisors (see below), whose sum is σ = 19682214. Its totient is φ = 6560736.

The previous prime is 13121473. The next prime is 13121489. The reversal of 13121474 is 47412131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12652249 + 469225 = 3557^2 + 685^2 .

It is not an unprimeable number, because it can be changed into a prime (13121473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280367 + ... + 3280370.

Almost surely, 2^13121474 is an apocalyptic number.

13121474 is a deficient number, since it is larger than the sum of its proper divisors (6560740).

13121474 is an equidigital number, since it uses as much as digits as its factorization.

13121474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560739.

The product of its digits is 672, while the sum is 23.

The square root of 13121474 is about 3622.3575196272. The cubic root of 13121474 is about 235.8635738364.

The spelling of 13121474 in words is "thirteen million, one hundred twenty-one thousand, four hundred seventy-four".